Percusive or Percussive: How To spell?
The word Percusive is misspelled against Percussive, an adjective meaning "Striking against; percutient; as, percussive force."
Percussive has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings percu & ive which should not be misspelled with single 'S'
Wrong Spelling:  percu-s-ive  Correct Spelling:  percu-ss-ive 
Check more misspelled words of Percussive to spell it correct.